code: def __init__(self, comm):
      self.comm = comm
  
      # We need to delay importing MPI4py (and momdules that import MPI4py)
      import chainermn.communicators._memory_utility as memory_utility_module
  
      self.memory_utility_module = memory_utility_module
  
file_path: chainer/chainermn/functions/batch_normalization.py
imports: import chainer
  from chainer.backends import cuda
  from chainer.functions.normalization import batch_normalization
  import chainer.utils
label_desc: Use image node_id 1 to create a new _NcclImpl object from inherited base classes: batch_normalization with example: obj = _NcclImpl(comm)